“…A small percentage of children and adolescents fall into the low average intelligence range (IQ 85–100), but also moderate to severe ID (35–55) is possible. Thus, learning difficulties are very common in preschool and primary school, especially within the domains of mathematics (De Smedt et al, 2009a, 2009b; Tobia, Brigstocke, Hulme, & Snowling, 2017; Wang, Woodin, Kreps-Falk, & Moss, 2000) and language comprehension (Glaser et al, 2002; Van den Heuvel et al, 2016). Cognitive deficits are seen in the majority (90–100%) of individuals with 22q11DS with impairments in sustained attention, executive function, memory, and visual-spatial perception (Antshel, Fremont, & Kates, 2008; Campbell & Swillen, 2005; Gur et al, 2014).…”